145715521489 has 2 divisors, whose sum is σ = 145715521490. Its totient is φ = 145715521488.

The previous prime is 145715521477. The next prime is 145715521493. The reversal of 145715521489 is 984125517541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122738115600 + 22977405889 = 350340^2 + 151583^2 .

It is a cyclic number.

It is not a de Polignac number, because 145715521489 - 2²⁷ = 145581303761 is a prime.

It is a super-2 number, since 2×145715521489² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145715521429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72857760744 + 72857760745.

It is an arithmetic number, because the mean of its divisors is an integer number (72857760745).

Almost surely, 2^145715521489 is an apocalyptic number.

It is an amenable number.

145715521489 is a deficient number, since it is larger than the sum of its proper divisors (1).

145715521489 is an equidigital number, since it uses as much as digits as its factorization.

145715521489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016000, while the sum is 52.

The spelling of 145715521489 in words is "one hundred forty-five billion, seven hundred fifteen million, five hundred twenty-one thousand, four hundred eighty-nine".